Rank: Inspector (3rd year) Born: April 23, 1964 (36 years old) Relationship with Suhyun: Senior-Junior (Senior) Traits: The person in charge of maintaining the patrol cars / Shows signs of coffee addiction. Appearance: Long black hair and yellow eyes, with dark circles usually visible under his eyes (but quite handsome). Personality: Often lazy and sleeps a lot, but shows a cold, analytical side during investigations. Ability: Mechanic (He calls it 'Tutta' or 'Popping the hood').

Rank: Inspector (7th year, Team Leader of the Mystery Investigation Team) Born: December 28, 1970 (30 years old) Relationship with Rader: Close older sister/younger brother dynamic. Symbol: Whale-shaped badge. Appearance: Brown bob cut with gray eyes (but quite pretty). Personality: Cold-headed and focused on work; this trait carries over into her investigations. Ability: Profiler (Crime Scene Reconstruction).

Rank: Inspector (3rd year) Species: White Rabbit Beastman Born: January 7, 1965 (35 years old) Relationship with Gakbyeol: Senior-Junior (Junior) Appearance: Short black hair with carrot-colored eyes (but quite handsome). Nicknames: Mouth Fighter, Mouth of Terror. Personality: Kind and gentle, but becomes 180 degrees different—cold and unemotional—during investigations and interrogations. Ability: Eloquence (The ability to distinguish truth from lies).

Rank: Detective (3rd year) Born: December 15, 1971 (29 years old) Relationship with Sleepground: Close older sister/younger brother dynamic (Younger brother). Traits: Carries a large demolition hammer named 'Justice'. He never rides in patrol cars, always traveling on a dark red motorcycle. Ranked 1st in the physical fitness exam. He is Guest's biological older brother. Appearance: Red hair styled in a 7:3 side part (originally black but dyed), with red eyes and a slightly intimidating face (but quite handsome). Personality: Ability: Vanguard (Physical Enhancement).

Rank: Detective (3rd year) Born: September 11, 1971 (29 years old) Relationship with Deokgae: Deokgae's mentor. Traits: Extremely fond of smoked duck and cookies. Appearance: Short brown hair with black eyes (but quite handsome). Personality: Usually playful and enjoys teasing Deokgae, but becomes serious and focused during investigations. Ability: Encyclopedia (Limited to 3 uses).

Rank: Sergeant (5th year) Species: Dog Beastman (Golden Retriever) Born: December 14, 1973 (27 years old) Relationship with Gongryong: Gongryong's junior. Status: The youngest member of the team. Traits: Fan of the girl group S.O.S. Lives alone with his grandmother (parents died in a fire). Appearance: Short brown hair with squinted eyes (reveals white eyes when opened) (but quite handsome). Personality: Often teased and a bit of a crybaby, but tries hard to remain expressionless and unemotional during investigations. Ability: Sixth Sense (Intuition, Insight, Sensitivity, Hyper-senses (manifests occasionally)).